Final answer:
The major topic in the book 'All You Can Ever Know' by Nicole Chung is the author's exploration of her identity, adoption, and race as she was born to Korean immigrants and adopted by a white family.
Step-by-step explanation:
The book All You Can Ever Know by Nicole Chung explores themes of identity, adoption, and race. The author, an American writer and editor, was born to Korean immigrants and adopted by a white family. The narrative revolves around her personal journey to understand her background and her quest to find her birth family. It delves into the complexities of growing up as an Asian American in a predominantly white community and the challenges of piecing together one's history and identity.